Add ScreenMask for icon drop outside

dde-dock/Panel/panel.cpp

@@ -1,6 +1,7 @@
 #include "panel.h"
 
-Panel::Panel(QWidget *parent) : QWidget(parent)
+Panel::Panel(QWidget *parent)
+    : QWidget(parent),parentWidget(parent)
 {
     leftLayout = new DockLayout(this);
     leftLayout->resize(1024,50);
@@ -17,6 +18,9 @@ Panel::Panel(QWidget *parent) : QWidget(parent)
     leftLayout->addItem(b3);
     leftLayout->addItem(b4);
     leftLayout->addItem(b5);
+
+    connect(leftLayout,SIGNAL(dragStarted()),this,SLOT(slotDragStarted()));
+    connect(leftLayout,SIGNAL(itemDropped()),this,SLOT(slotItemDropped()));
 }
 
 void Panel::resize(const QSize &size)
@@ -31,6 +35,36 @@ void Panel::resize(int width, int height)
     leftLayout->resize(this->width() * 2 / 3,this->height());
 }
 
+void Panel::showScreenMask()
+{
+    qWarning() << "[Info:]" << "Show Screen Mask.";
+    maskWidget = new ScreenMask();
+    connect(maskWidget,SIGNAL(itemDropped(QPoint)),this,SLOT(slotItemDropped()));
+
+    //TODO change to Other ways to do this,it will hide the drag icon
+    parentWidget->hide();
+    parentWidget->show();
+}
+
+void Panel::hideScreenMask()
+{
+    qWarning() << "[Info:]" << "Hide Screen Mask.";
+    disconnect(maskWidget,SIGNAL(itemDropped(QPoint)),this,SLOT(slotItemDropped()));
+    maskWidget->hide();
+    maskWidget->deleteLater();
+    maskWidget = NULL;
+}
+
+void Panel::slotDragStarted()
+{
+    showScreenMask();
+}
+
+void Panel::slotItemDropped()
+{
+    hideScreenMask();
+}
+
 Panel::~Panel()
 {
 

dde-dock/Panel/panel.h

@@ -6,6 +6,7 @@
 #include <QDebug>
 #include "Widgets/appitem.h"
 #include "Widgets/docklayout.h"
+#include "Widgets/screenmask.h"
 
 class Panel : public QWidget
 {
@@ -17,11 +18,19 @@ public:
     void resize(const QSize &size);
     void resize(int width,int height);
 
+    void showScreenMask();
+    void hideScreenMask();
+
 signals:
 
 public slots:
+    void slotDragStarted();
+    void slotItemDropped();
+
 private:
     DockLayout * leftLayout;
+    QWidget * parentWidget = NULL;
+    ScreenMask * maskWidget = NULL;
 };
 
 #endif // PANEL_H

dde-dock/Widgets/appitem.cpp

@@ -106,6 +106,8 @@ void AppItem::mouseMoveEvent(QMouseEvent *event)
     {
         QDrag* drag = new QDrag(this);
         QMimeData* data = new QMimeData();
+        QImage dataImg(this->itemIconPath);
+        data->setImageData(QVariant(dataImg));
         drag->setMimeData(data);
 
         QPixmap pixmap(this->itemIconPath);
@@ -130,8 +132,18 @@ void AppItem::leaveEvent(QEvent *event)
 void AppItem::dragEnterEvent(QDragEnterEvent *event)
 {
     emit dragEntered(event,this);
-//    event->setDropAction(Qt::MoveAction);
-//    event->accept();
+
+    AppItem *tmpItem = NULL;
+    tmpItem = dynamic_cast<AppItem *>(event->source());
+    if (tmpItem)
+    {
+//        qWarning()<< "[Info:]" << "Brother Item.";
+    }
+    else
+    {
+        event->setDropAction(Qt::MoveAction);
+        event->accept();
+    }
 
 //    if (event->mimeData()->hasFormat("application/x-dnditemdata")){
 //        if (event->source() == this){

dde-dock/Widgets/appitem.h

@@ -10,6 +10,7 @@
 #include <QDrag>
 #include <QMimeData>
 #include <QPixmap>
+#include <QImage>
 #include <QDebug>
 #include "dockitem.h"
 #include "dockconstants.h"

dde-dock/Widgets/docklayout.cpp

@@ -199,6 +199,8 @@ void DockLayout::dropEvent(QDropEvent *event)
     {
         insertItem(tmpItem,lastHoverIndex);
     }
+
+    emit itemDropped();
 }
 
 void DockLayout::slotItemDrag(AppItem *item)
@@ -208,6 +210,8 @@ void DockLayout::slotItemDrag(AppItem *item)
     if (tmpIndex != -1)
     {
         dragoutFromLayout(tmpIndex);
+
+        emit dragStarted();
     }
 }
 

dde-dock/Widgets/docklayout.h

@@ -42,6 +42,10 @@ public:
     int indexOf(AppItem * item);
     int indexOf(int x,int y);
 
+signals:
+    void dragStarted();
+    void itemDropped();
+
 protected:
     void dragEnterEvent(QDragEnterEvent *event);
     void dropEvent(QDropEvent *event);

dde-dock/Widgets/screenmask.cpp

@@ -0,0 +1,40 @@
+#include "screenmask.h"
+
+ScreenMask::ScreenMask(QWidget *parent) : QWidget(parent)
+{
+    QRect rec = QApplication::desktop()->screenGeometry();
+    this->resize(rec.width(),rec.height());
+    this->setWindowFlags(Qt::ToolTip);
+    this->setWindowOpacity(0);
+
+    setAcceptDrops(true);
+
+    this->show();
+}
+
+void ScreenMask::dragEnterEvent(QDragEnterEvent *event)
+{
+    event->setDropAction(Qt::MoveAction);
+    event->accept();
+}
+
+void ScreenMask::dropEvent(QDropEvent *event)
+{
+    qWarning() << "Item drop here:" << event->pos() << event->mimeData()->hasImage();
+    QImage image = qvariant_cast<QImage>(event->mimeData()->imageData());
+    if (!image.isNull())
+    {
+        TransformLabel * imgLabel = new TransformLabel();
+        imgLabel->setAttribute(Qt::WA_TranslucentBackground);
+        imgLabel->setWindowFlags(Qt::ToolTip);
+        imgLabel->setPixmap(QPixmap::fromImage(image));
+        imgLabel->move(event->pos());
+        imgLabel->show();
+
+        //TODO add animation here
+        QTimer::singleShot(1000,imgLabel,SLOT(deleteLater()));
+
+        emit itemDropped(event->pos());
+    }
+
+}

dde-dock/Widgets/screenmask.h

@@ -0,0 +1,52 @@
+#ifndef SCREENMASK_H
+#define SCREENMASK_H
+
+#include <QApplication>
+#include <QDesktopWidget>
+#include <QWidget>
+#include <QLabel>
+#include <QPixmap>
+#include <QTransform>
+#include <QPropertyAnimation>
+#include <QDragEnterEvent>
+#include <QDragMoveEvent>
+#include <QDropEvent>
+#include <QMimeData>
+#include <QTimer>
+#include <QDebug>
+
+class TransformLabel : public QLabel
+{
+    Q_OBJECT
+    Q_PROPERTY(QTransform transform READ getTransform WRITE setTransform)
+public:
+    explicit TransformLabel(QWidget *parent=0) : QLabel(parent){}
+
+    QTransform getTransform(){return this->pixTransform;}
+    void setTransform(const QTransform &value)
+    {
+        this->pixTransform = value;
+        this->setPixmap(this->pixmap()->transformed(value));
+    }
+
+private:
+    QTransform pixTransform;
+};
+
+class ScreenMask : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit ScreenMask(QWidget *parent = 0);
+
+protected:
+    void dragEnterEvent(QDragEnterEvent *event);
+    void dropEvent(QDropEvent *event);
+
+signals:
+    void itemDropped(QPoint pos);
+
+public slots:
+};
+
+#endif // SCREENMASK_H

dde-dock/dde-dock.pro

@@ -24,7 +24,8 @@ SOURCES += main.cpp\
     Widgets/appitem.cpp \
     Widgets/docklayout.cpp \
     Widgets/windowpreview.cpp \
-    Widgets/dockitem.cpp
+    Widgets/dockitem.cpp \
+    Widgets/screenmask.cpp
 
 HEADERS  += mainwidget.h \
     Panel/panel.h \
@@ -37,7 +38,8 @@ HEADERS  += mainwidget.h \
     Widgets/appitem.h \
     Widgets/docklayout.h \
     Widgets/windowpreview.h \
-    Widgets/dockitem.h
+    Widgets/dockitem.h \
+    Widgets/screenmask.h
 
 RESOURCES += \
     images.qrc